Ronn Motor Company (RMC) Scorpion

The Scorpion made its official public debut at the 2008 SEMA show.

Ronn Motor Company (RMC) Scorpion
The Scorpion, which made its official public debut at the SEMA show, is a new exotic sports car like no other. What makes it unique is its powerplant, a twin-turbocharged 3.5-liter V-6. The engine block and 6-speed manual gearbox are supplied by Acura. The most notable feature is Ronn Motor Company's hydrogen system, which makes this supercar amazingly fuel efficient and environmentally friendly. According to company President and founder Ronn Maxwell, the Hydrogen Fuel Injection (HFI) system provides hydrogen on demand, which is injected directly into the engine. This approach is said to increase fuel mileage between 20–40 percent and reduce CO2 emissions to nearly zero. The hydrogen is produced through electrolysis of water using the power generated from the vehicle's electrical system. A small amount of hydrogen is added to the vehicle's intake air/fuel mixture, allowing the engine to operate with less fossil fuel.

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What this means is you don't need to look for hydrogen filling stations when you're out of hydrogen. All you need to do is add water to a small tank in front of the car. The 2-seat Scorpion gets 40 mpg, according to Maxwell; not bad for a 600-bhp car. It weighs less than 2000 lb., which enables it to go from zero to 60 mph in about 3.5 seconds.

To achieve this low weight, RMC used lots of carbon fiber — most of the car's body panels are made of the exotic material. The exterior was designed by Maxwell himself, and is very aerodynamic. Maxwell says he's already taking orders for the Scorpion, which comes with a price tag of $175,000.